Twitter co-founder Biz Stone to rejoin firm

Twitter co-founder Biz Stone has said he plans to rejoin the social media site in the next few weeks. Mr Stone left Twitter in 2011, after the exit of fellow co-founders. Twitter co-founder talks about the future of social media. After a recent visit to Twitter, Mr Stone said he couldn't turn down the chance to work there again. Mr Dorsey also shared the news on Twitter, writing: "Excited to have Biz's energy and heart back at Twitter! #BizIsBack".